Adjustable self-closing valve



Nov. 10 1925- J. G. EVERSTAM ADJUSTABLE SELF CLOSING VALVE 2 Sheets-Sheet .L

Filed Dec. 15. 1924 Even/or.

Nov. 10,1 2 1 1,560,770

J. G. EVERSTAM ADJUSTABLE SELF CLOSING VALVE Filed Dec. 15. 1924 2 Sheets-Sheet 2 .Ibvenfar:

. let'and an outlet, a valve body controlling the direct flow of fluid from the inlet to the' outlet and connected with a movable parti- Patented Nov. 10, 192 5.

Application med December 15, 19a. Serial No. 755,917.

To allinhom. it nay concern:

Be it known that I, J OHA'N GUNNAR Evna- STAM, a subject of the King of Sweden, re

siding at Sundsvall, Sweden, have invented a new and useful Improvement in Adjustable Self-Closing Valves, of which the following is a specification.

The present invention relates to self-clos-' ing valves which are adapted to remaino'pen during a certain length of time after each actuation, and during such time to allowa certain quantity of liquid or gas to pass through the valve, after which the valve closes automatically. Such valves comprise in the main a casing member having an intion, such as a diaphragm or a piston,-'separating two chambers in said casing one, of which is in directcommunic-ation with the inlet, and the other of which communicates with the inlet through a restricted passage and with the 'outlet through a normally closed valve controlled passage. The valve in the last mentioned passage, which may be termed an auxiliary valve. is adapted-to be manually operated from the outside of the casing member, and when so operated itallows the fluid in the second chamber to;

escape to the outlet, with the result thatffthe pressure of the fluid in the first mentioned chamber which is in direct communication:

with the inlet, will act on the movable parti tion and displace the same, thus openmgthe valve body and establishing direct communication between the inlet and the outlet. The auxiliary valve is adapted to close, under spring actuation or the like, as soon as it 1s released, and the length of time during which the main valve'body will'afte rwards remain open is dependent upon the length of time required for the fluid to flow.f-from the inlet through the restricted passage into said second chamber and equalize the pressure on both sides of the movable partition, when the main valve body will close to the flow of'fluid through the same. and it' actuated, for instance, by its own weight. It will thus be understood that the proper operation of such valves is dependent to a very large degree'upon the said restricted passage always offering the same resistance is therefore very important that the said passage is kept free from foul matter which might clog the same.

- Now-the present invention relates to certain improvements. in valves of the type above described with a view to make such valves more safe and reliable in operation. One of the features of-ythe invention 'con- 'sists in that a sieve is providedin the restricted passage from the inlet to the second chamber. Said sieve may preferably be located in the inletin such manner that it covers the port of the said passage in said inlet, and the" sieve will thus be flushed by the water flowing through the inlet tothe outlet when the valve is open. A further feature. of the invention consistsin. that a needle valve which is adjustable from'the' outside of the casing, for controlling a constriction in the restricted passage, is capable of such play that it may-bemovedintosaid constriction for thus removing any foul mat-.

ter which may have. collected, in thesame,

means such as aspring being-preferablyprm f videdfor returning said needle valve to its I adjusted normal position after 'each'such actuation. Other features of the invention will be explained in the followingdescriptionand-defined in the claims.

The accompanying drawings illustrate way of example a few embodiments of the invention.. Fig. 1 shows avertical section ofa flush valve according to the invention. Fig; 2 shows .a top plan view of .the valve and Fi 3 shows a horizontal sectionon the line II III'- in Fig 1'. Fig. 4 shows a fractional view of a slightly modified construction. Fig. 5-shows a vertical'section of a third embodiment of a flush valve.

Referringto Figs. 1, 2, and 3,'1-den0t'es a body portion which is provided with a 6.

cap 2, "saidbody portion and cap forming together the casing member of the valve.

as a cylinder 3 in which a piston-=4 is movable, said piston dividing said cylinder'into .1 m"

twochambers 5 and6 and forming a mov-- The interior of the bodyportion 1 is formed able partition between these chambers. The

chamber 5 below. the iston 4 is indirect communication with t e" inlet 16 which is -formed as a nipple on the body rtion-1 for connection with a water pipe. he bod portion is also rovided 'wit an outlet the upper rim 0 which formsa seat 8 for I the main valve body 9 which is connected through a stem 10. with the piston 4. The valve 9 is provided with a packing 11 which serves .to modifythe impact of the valve body 9 against the seat 8 when the valve rot the valve body and its seat. As illustrated in the drawing the valve body 9 has approximately the shapeof a cup,'having a lower portion 12 which, in the closed position of the valve reaches into the outlet 7' and is of conical or slightly rounded shape, for the purpose that when the valve body returns from its raised or open position to its closed position the said curved or conical lower portion 12 shall gradually decrease the area of flow to nil immediately before the valve body stops against its seat 8, for in this manner gradually to decrease the velocity of flow-of the fluid between said portion 12 of the valve body and the upper rim or seat 8 of the outlet 7, so that the valve body will close with the least possible shock.

A guide member consisting of a cross or spider, 13 the outer ends-of the arms of which are adapted to slide against the inner cylindrical wall of the outlet 7 is connected with the valve body 9 through a short stem 14, said spider serving to guide the valve body during its movement. The

pressure of the water flowing. through the.

outlet 7 when the valve body 9 is in open position, acting on the arms of said spider also aids the valve body to close.

A passage 15 is formed in the body portion 1f and in the cap 2, said passage leading from the inlet 16 to the chamber 6 and communicating with said chamber through a small aperture 17 which forms a c0nstr1c-' tion in said passage. In the embodiment illustrated, the port of said passage 15 opening into the inlet 16 is formed as" an annular groove 18 in the wall of said inlet.

Said port or groove is covered b a sieve 19 in the shape of a cylindrical s eeve which lines the inner cylindrical surface of the inlet 16 and is retained in position therein by a ring 20 secured to the end of said sieve and bearing against a seat 21 in said inlet.

A needle valve 22 is screw threaded into the cap 2 and passes through 'a'packing box having a cap 23, said valve being in alignment with the axis of the aperture or iconstriction 17. Said needle valve is adjusted P 33. The fluid in the chamber 6 may thus said constriction, such that it allows thev fluid to flow from the passage 15 through said constriction into the chamber 6 with a certain speed corresponding to the desired length of time-for fillin said chamber. The needle valve is actuate b a coil spring 24 one end of whichi attac ed to the needle valve and the other end of which is attached to a fixed member, such as a stud 25 attached to thecap 2. Said coil spring 24 tends to turn the needle valve 22 in such direction that it is moved awa from the constriction 17, such turning o the needle valve 22 being prevented by a lateral arm mately I 26 secured to the needle valve bearing against the'end wall of a, slot 27 in a cap 28. The top portion 29 of said cap is provided with two curved slots 30 and is covered by a disk 31. Screws 32 traverse said disk 31 and the slots 30 in the top portion 29 of the ca 28 and are screw-threaded into the cap 2 t us securing said cap 28 to said cap 2. By loosening the screws 32 slightly the cap 28, which'is coaxial with the needle valve 22, may be turned for-adjustment after which it may again be secured by tightening the screws 32. The spring 24 maintaining the arm 26 hearing against the end wall of the slot 27 in said cap 28, su ch turning and adjustment of the cap 28 will effect a corresponding turning of the needle valve 22 and thus adjustment of the same towards or away from the constriction 17. The slot 27 has such peripheral extension that the arm 26 may be turned through approxibefore it strikes the other end wall of said slot, the pitgh portion of the needle valve being such that at such turning of the arm 26 the end. of the needlevalve 22 will be moved down into the a erture orconstriction 17 and remove all dirt which may have collected in the same. When the arm 26 is released, the spring 24 returns the same and the needle valve to the adjusted normal position.

The chamber 6 communicates with the outlet 7 through a passage 33 formed in the cap 2 and the body portion 1, said commumcation being controlled by a valve 34 which is normally maintained closed by a ggil s rlng 35 acting on a nut 36 on the stem 0 opened by actuating a lever 38 which bears against the end of the valve stem 37 and is 'pivoted at 39 in a standard 40 which is soing the coil spring 35.

of the threaded said valve. The said valve-may be '42 projecting from the cap 2 and surround- The operation of the valve is as followsi 1 When the lever 38 is operated the auxiliary valve 34 is depressed againstthe action of the spring 35 and the chamber 6 is thus laced in communication with the passage through the passage 15 and the constriction 17 into the chamber 6 now gradually fills said chamber and increases the pressure in the same, until said pressure becomes equal to and afterwards shghtly in excess of the pressure below the piston 4 in the chamber 5, said piston and the valve body 9 thus moving downwards and finally shutting off the direct communication between the inlet 16 and the outlet-7 when the valve body 9 reaches its seat 8. The sieve 19 prevents rust and other particles in the water from I entering the passage 15, such particles col lecting on the sieve from which they will be washed away on the next operation of 'the valve and follow the fluid to the outlet 7.

removed by turning the arm 26 in the manner above described,-and it is thus assured that the chamber 6 shall always require the same length of time to be filled after each actuation of the auxiliary valve 34, and thus that the same quantity of fluid shall always pass through the valve upon each such actuation.

Fig. 4 shows a slightly modified form of the needle valve. The needle valve 22 is provided with a head 45 by means of which it may be turned towards and away from the constriction 17, the valve being provided with a conical end which may thus be moved into said constriction for removing dirt from the same. A groove 46 is cut in said coni- .cal end which groove rovides the desired area of flow past the point of the valve.

Inthe embodiment illustrated in Fig. 5

the construction of the needle valve, 22 differs from that described in connection with Fig. 1 in that the needle valve is provided with a collar 48 between which and a-pa'cking ring 49 a spring 50 is inserted which tends to move the needle valve away trom the constriction 17. The needle valve 22 is movable endwise and is maintained by the spring 50 bearing with its collar 48 against a ring 51 screwed into the upper end of the sleeve or packing box 52. By adjusting said ring 51 the needle valve 22 may thus be adj usted towards or away from the constriction 17 The lever 38 by means of which the auxiliary valve 34 may be opened, is located over the upper end of the needle valve 22, so that when said lever 38 is depressed for opening said auxiliary valve 34 it will simullaneously depress the needle valve 22 and force the end of the same into the constriction 17 for removing deposits from the same. The lever 38 is journalled at 53 in a cap or cover 54 which may be secured to the cap 2 in any suitable manner. In other respects this construction is similar to that above described with reference to Fig. 1, and similar reference numerals are used in the drawings to indicate similar parts.

It will be understood that although the embodiments above described and illustrated in the drawings have proved to be ver suitable in practice, the invention is not limited to these preferred constructions, as various changes and modifications will readily sug-' gest themselves to those skilled in the art,

without departing from the principle and sco'pe ofthe invention as definedin the accompanying claimsQ "I claim:

1. A flush valve having a casing member, an inlet to said casing, an outlet from said casing, a valve body controlling the direct flow of fluid from the inletto the outlet, two chambers in said casing, a movable partition separating said chambers and connected with said valve body, oneof said chambers being in direct communication with said inlet, a passage for the supply of liquid 4 'from said inlet to the other of said chambers,

a constriction in said passa e, a needle valve adjustable from the outsi e of said casing for controlling said constriction,'said needle valve being moyable into said constriction,

. a spring tending to"retract said needle valve from said constriction, a stop for said needle valve, and a normally closed valve controlled passage for the discharge of fluid from said second chamber to the outlet.

2. A flush valve having a casing member, an inlet to said casing, an outlet from said casing, a valve body controlling the direct flow of fluid from the inlet to. the outlet, two chambers in said casing, a movable partition separating said chambers andconnect- 'ed'with said valve body, one of said chambers being in direct communication with said inlet, a passage for the supply of liquid from said inlet to the other of said chambers, a

-c(; nstrict ion in said passage, a needle valve for controlling said constriction, said needle valve being movable into said constriction,- a spring tendingto retract said needle valve from said constriction, a stop ,for said needle valve, a sieve in said passage, and a normally closed valve controlledpassage for the discharge of fluid from said second I chamber to the outlet.

3. A flush valve "having a casing member, an inlet to said casing, an outlet from said casing, a valve bodycontrolling the direct flow of fluid from. the inlet to the outlet, two chambers in said casing, a movable partition separating said chambers and connected with said valve body, one of said cha1nbers being in direct communication withsaid inlet, a passage for the supply of liquid from said inlet to the other of said chambers, a constriction in said passage, a needle valve adjustable from the outside of said casing for controlling said constriction, said needle valve being movable into said constriction, a spring tendingto retract said needle valve from said constriction, a stop for said needle valve, a passage for the discharge of fluidfrom said second chamber to the outlet, a

valve normally closing said discharge pas sage, and a lever. adapted to simultaneously actuate saidla'st-mentioned valve to open the same and said needle valve to move the same i into said constriction.

- with said'inlet, a passage for the supply of fluid from said inlet to the other of said chambers, a constrictionin said passage, a needle valve adjustable from the outside of said casing for controlling said constriction, said needle valve bein normally in a position entirely outside. ut in [register with said constriction and being movable intosaid constriction, a spring tending 'to -retract said needle valve, from said constriction, a stop for said needle valve, and a normally closed valve controlled passage for the discharge offluid from said second chamber to the outlet.- r v 5. A flush valve having a casing member, an inlet-to said casing, an outlet from said casing, a valve body controlling the direct flow of liquid from the inlet'to the outlet,

- two chambers in said casing, a movable partition separating said chambers and 'connected with said valve body, one of said chambers being in direct communication with saidinlet, a passage for the supply of fluid from said-inlet to the other of said chambers, a c'onstriction in' said passage, 8.

' needle valve adjustable from the outside of said casing for controlling said constriction,

said needle valve bein normally in a position entirely outside but in register with said constriction and being movable. into said constriction a spring tending to 're tract said needle valve from said constriction, an adjustable stop for said needle.

valve, and a normally \closed valve controlled passage for the discharge' .of fluid same into said constriction.

fromsaid second chamber to the outlet,

6. A flush valve'havingja;casingrmember, j

aninlet to-said casing, an outlet from said casing, a valve body controlling the direct flow of fluid from the inlet to the outlet, two chambers in said casing, a movable partition separating said chambers and connected with said valve body, one of said chambers being in direct communication with said inlet, a passage for the supply of fluid from said inlet to the other of said chambers, a constriction in said passage, a needle valve adjustable from the outside of said casing for controlling said constriction,

said needle valve being normally in a position entirely outside but in register with said constriction and being movable into saidconstriction, a spring tending to re tract said needle valve from said constriction, a stop for said needle valve, apassage for the discharge of fluid from said second chamber to the outlet, a valve nor- I mally closing said discharge passage, and a lever adapted to simultaneously actuate said last mentioned valve to open the same and said needle valve to move the same into said constriction.

7. A flush valve having a casing member,

an inlet to said casing, an outlet from said casing, a valve body controlling the direct flow of fluid from the inlet-to the outlet,

two chambers in saidcasing, a movable partition Y separatln sald chambers and con nected with sai valve body, one ofsaid chambers being in direct communication with said inlet, ,a passage for the supply-of fluid from said inlet to the other of said chambers, a constriction in said passage, a needle valve adjustable from the outside of said casing for controlling said constriction, said needle valve being normally in a position entirely outside but in register with said constriction, and beingmovable into said constriction, a spring tending to re-- tract said needle valve from said constriction, an adjustable stop 'for said needle valve, a passage for the discharge of fluid from said second, chamber' to the outlet,

' avalve normally closing said discharge passage, anda lever adapted to simultaneously actuate said last-mentioned valve to open the same and said needle valve to move the JOHAN GUNNAR EVERSTAM. 

